QuoteI use flash a lot - including bright sunshine - as it lets you control the light to bring out the subject from the background, I find turning down exposure compensation (-1/3) and flash exposure up (+1/3) just lifts the subject out of the background without using blur
Yes, this is a great idea. If no flash is permitted as you point out at a reception that raises a whole other issue with the WB.
Whatever the situation flash / no flash, higher ISO lower ISO , I would think a White Balance card needs to be included. If a wedding photographer used the AWB or any presets that would be a cause for concern from my point of view.
I tend not to use AWB and carry one of these around incase i need a custom WB
the cards are good but take too long this you just pop on the lens snap a shot off in the general direction and set your custom balance,
here is a review of them